:root {
  --bg: #0f1220;
  --bg-2: #121530;
  --card: #171a2f;
  --text: #eaf0ff;
  --muted: #aeb7d9;
  --accent: #78e6a2;
  --accent-2: #6fc0ff;
  --border: #263052;
  --danger: #ffb3b3;
  --table-head: #1b2144;
}

body.light {
  --bg: #f5f7fa;
  --bg-2: #e2e8f0;
  --card: #ffffff;
  --text: #1a202c;
  --muted: #4a5568;
  --accent: #2f855a;
  --accent-2: #3182ce;
  --border: #cbd5e0;
  --danger: #e53e3e;
  --table-head: #edf2f7;
}


* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% 10%, #1e2246 0%, rgba(18,16,48,0) 60%),
    radial-gradient(900px 400px at 90% 20%, #0b5d82 0%, rgba(18,16,48,0) 70%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}


a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }


.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

header { padding: 40px 0 20px 0; }
.nav { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.logo img { height: 36px; width: auto; }
.actions { display: flex; align-items: center; gap: 10px; }

.nav ul { display: flex; gap: 14px; list-style: none; margin: 0; padding: 0; }
.nav a { padding: 8px 12px; border-radius: 8px; position: relative; }
.nav a:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }
.nav a:hover { background: rgba(38,48,82,0.35); }

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0%;
  height: 2px;
  background: var(--accent-2);
  transition: width 0.3s ease;
}
.nav a:hover::after { width: 100%; }


.btn {
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s ease-in-out, box-shadow 0.3s ease;
}
.btn.primary { background: linear-gradient(180deg, #1aa158, #0e6e3a); color: #fff; }
.btn.secondary { background: linear-gradient(180deg, #14365a, #0b2343); color: #fff; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 0 12px var(--accent-2); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.toggle-mode {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  color: var(--text);
}


.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 24px; align-items: center; margin-top: 40px; }
.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}
.hero h1 { margin: 0 0 12px 0; font-size: 2.4rem; }
.hero p { margin: 0 0 16px 0; color: var(--muted); }


section {
  padding: 42px 0;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.8s ease forwards;
}
.section-title { font-size: 1.6rem; margin-bottom: 10px; }
.section-sub { color: var(--muted); margin-bottom: 20px; }

.grid-2, .grid-3 { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  transition: all 0.2s ease-in-out;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(0,0,0,0.3); }


table { width: 100%; border-collapse: collapse; border: 1px solid var(--border); }
thead th { background: var(--table-head); color: var(--text); padding: 12px; text-align: left; }
tbody td { padding: 12px; border-bottom: 1px solid var(--border); color: var(--muted); }


details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  background: var(--card);
}
details + details { margin-top: 12px; }
summary { font-weight: 600; cursor: pointer; }
summary:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 4px; }


footer {
  padding: 30px 0;
  color: var(--muted);
  border-top: 1px solid var(--border);
  text-align: center;
}
footer a { color: var(--accent-2); margin: 0 10px; }


#scrollTopBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: none;
  z-index: 999;
}


.stock-img {
  max-width: 100%;
  border-radius: 12px;
  margin: 16px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}


.skip-link {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--accent-2);
  color: #fff;
  padding: 8px 12px;
  z-index: 1000;
  border-radius: 6px;
  transform: translateY(-200%);
  transition: transform 0.3s ease;
}
.skip-link:focus {
  transform: translateY(0);
}


@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .nav ul { flex-wrap: wrap; }
  .nav a {
    padding: 10px; 
  }
  nav ul {
  display: flex;
  flex-wrap: wrap;   /* allows wrapping */
  justify-content: center;
  list-style: none;
  padding: 0;
  margin: 0;
}
  
  nav li {
  margin: 5px;
}
  
nav a {
  display: block;
  padding: 10px 15px;
  text-decoration: none;
  color: #06C258;
}

  @media (max-width: 600px) {
  nav ul {
    flex-direction: column;   /* stack vertically */
    align-items: center;      /* center the buttons */
  }
  nav li {
    width: 100%;              /* make each button full width */
    text-align: center; 
  }
  }
}